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1. I am soo stuck. I always learn it but forget it. Can somebody please help me.

I know range is the output, and domain the input.

Is there any 'cheat' I can do?
2. do you mean a way of remembering what the 2 are?

d comes before r in the alphabet? so domain is the numbers you put in, and range is what you get out??
3. (Original post by Heeere's Johnny!)
do you mean a way of remembering what the 2 are?

d comes before r in the alphabet? so domain is the numbers you put in, and range is what you get out??
Sorry I meant how to apply that to a question I.e

F(x)= 1/x+1 where x>3

Find range?
4. (Original post by games211)
Sorry I meant how to apply that to a question I.e

F(x)= 1/x+1 where x>3

Find range?
Just substitute x=3 in which would be f(x)=1/4. Therefore the range of f(x) is <1/4.
5. (Original post by Mathsz0r)
Just substitute x=3 in which would be f(x)=1/4. Therefore the range of f(x) is <1/4.
but why is the sign <1/4
6. (Original post by games211)
but why is the sign <1/4
If the x values are x>3, 1/1+x is going to be a decreasing value. Try it - substitute in x=4,x=5 etc. It'll eventually converge to 0 for x tending towards infinity.

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